Hydrotreating catalyst and hydrotreating process of hydrocarbon oil by using the same

Abstract

This invention relates to a hydrotreating catalyst for a hydrocarbon oil and also to a process for hydrotreating the hydrocarbon oil by using the catalyst. More specifically, the present invention is concerned with a hydrotreating catalyst formed by having a hydrogenation-active component supported on a silica-alumina carrier and having a specific pore distribution and also with a hydrotreating process making use of the catalyst for the removal of sulfur compounds and nitrogen compounds from a hydrocarbon oil.

What is claimed is: 
     
       1. A hydrotreating catalyst composed of a carrier, which is formed of silica-alumina containing silica in a proportion of from 2 to 40 wt. % based on the whole weight of said carrier, and at least one hydrogenation-active metal component supported on said carrier, characterized in that: (a) the volume of pores having diameters in a range of from 30 to 100 Å as measured by the nitrogen adsorption method accounts for 50 to 70% of the volume of pores having diameters in a range of from 0 to 150 Å as measured by the nitrogen adsorption method, and the volume of pores having diameters in a range of from 100 to 150 Å as measured by the nitrogen adsorption method accounts for 15 to 40% of the volume of pores having diameters in a range of from 0 to 300 Å as measured by the nitrogen adsorption method;   (b) the volume of the pores having the diameters in the range of from 0 to 300 Å as measured by the nitrogen adsorption method accounts for at least 70% of the volume of pores having diameters of 40 Å and greater as measured by the mercury porosimetry; and   (c) said catalyst has a specific surface area of at least 200 m2/g.   
     
     
       2. A process for the hydrotreatment of a hydrocarbon oil, characterized in that said hydrocarbon oil is brought into contact with hydrogen in the presence of a hydrotreating catalyst according to claim 1.